Ideal length for ad copy for e-commerce/online ordering

After watching through Jason's module on copywriting I noticed the ad copy was quite a lot longer than what I have been writing on my ads (generally not longer than 4 lines).

I was wondering if there was a "best" length for ad copy and if it depends on the product being sold. If so, what factors determine how long ad copy should be for any given product?

And what are the advantages/disadvantages of having shorter or longer copy?

Thanks in advance! 🫡

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